/*
 *
 *  *  Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
 *  *
 *  *  Licensed under the Apache License, Version 2.0 (the "License");
 *  *  you may not use this file except in compliance with the License.
 *  *  You may obtain a copy of the License at
 *  *
 *  *       http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  *  Unless required by applicable law or agreed to in writing, software
 *  *  distributed under the License is distributed on an "AS IS" BASIS,
 *  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  *  See the License for the specific language governing permissions and
 *  *  limitations under the License.
 *  *
 *  * For more information: http://www.orientechnologies.com
 *
 */
package com.orientechnologies.orient.core.sql.operator;

import com.orientechnologies.orient.core.command.OCommandContext;
import com.orientechnologies.orient.core.db.ODatabaseDocumentInternal;
import com.orientechnologies.orient.core.db.ODatabaseRecordThreadLocal;
import com.orientechnologies.orient.core.db.record.OIdentifiable;
import com.orientechnologies.orient.core.id.ORID;
import com.orientechnologies.orient.core.serialization.serializer.record.binary.OBinaryField;
import com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinary;
import com.orientechnologies.orient.core.sql.filter.OSQLFilterCondition;

/**
 * NOT EQUALS operator.
 *
 * @author Luca Garulli
 */
public class OQueryOperatorNotEquals extends OQueryOperatorEqualityNotNulls {

  private boolean binaryEvaluate = false;

  public OQueryOperatorNotEquals() {
    super("<>", 5, false);
    ODatabaseDocumentInternal db = ODatabaseRecordThreadLocal.INSTANCE.getIfDefined();
    if (db != null)
      binaryEvaluate = db.getSerializer().getSupportBinaryEvaluate();
  }

  @Override
  protected boolean evaluateExpression(final OIdentifiable iRecord, final OSQLFilterCondition iCondition, final Object iLeft, final Object iRight, OCommandContext iContext) {
    return !OQueryOperatorEquals.equals(iLeft, iRight);
  }

  @Override
  public boolean isSupportingBinaryEvaluate() {
    return binaryEvaluate;
  }

  @Override
  public boolean evaluate(final OBinaryField iFirstField, final OBinaryField iSecondField, OCommandContext iContext) {
    return !ORecordSerializerBinary.INSTANCE.getCurrentSerializer().getComparator().isEqual(iFirstField, iSecondField);
  }

  @Override
  public OIndexReuseType getIndexReuseType(final Object iLeft, final Object iRight) {
    return OIndexReuseType.NO_INDEX;
  }

  @Override
  public ORID getBeginRidRange(Object iLeft, Object iRight) {
    return null;
  }

  @Override
  public ORID getEndRidRange(Object iLeft, Object iRight) {
    return null;
  }
}
